State of MariaDB

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The MariaDB update for 2011 from Michael Widenius of Monty Program. This was a keynote given on Wednesday 13 April 2011 at the O'Reilly MySQL Conference & Expo 2011.

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State of MariaDB

  1. 1. MariaDB State of MariaDB Michael “Monty” Widenius MariaDB hacker monty@askmonty.org http://mariadb.com/Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  2. 2. The origin of My (SQL) At start: Lots of traveling and meeting interesting peopleNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  3. 3. The origin of My (SQL) Combined with working from homeNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  4. 4. The origin of My (SQL) Things were goodNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  5. 5. The origin of My (SQL) Even if there were some growing painsNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  6. 6. The origin of My (SQL) Then we came into strange companyNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  7. 7. The origin of My (SQL) Which scared some of us a bit...Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  8. 8. The origin of My (SQL) and Maria (DB) Fortunately there is someone else that can continueNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  9. 9. The origin of My While My continues to travelNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  10. 10. The origin of My Free as a birdNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  11. 11. The origin of Maria (DB) But is the next generation up to it?Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  12. 12. The origin of Maria (DB) Its a hard job taking over a successNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  13. 13. The origin of Maria (DB) Like pulling out a rabbit from a hatNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  14. 14. The origin of Maria (DB) Just charm is not enoughNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  15. 15. The origin of Maria (DB) But we are confident we can pull it offNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  16. 16. The origin of Maria (DB) So lets be happy that...Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  17. 17. The origin of Maria (DB) We still can put our trust in the creators of MySQLNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  18. 18. The team behind MariaDB at MP The project name has changed, but the core team is the same (Please ignore a couple of innocent bystanders)Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  19. 19. Mug shot of the guiltyNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  20. 20. The team behind MariaDB at MP Igor Babaev Timour Katchaounov Sergey Petrunya Since 2002 Since 2002 Since 2003 Optimizer teamNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  21. 21. The team behind MariaDB at MPSergei Goulibchik Igor Babaev Michael “Monty” Widenius Since 2000 Since 2002 Since 1993 The Original ArchitectsNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  22. 22. The team behind MariaDB Kristian Nielsen Since 2005 Replication (and build) teamNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  23. 23. The team behind MariaDB at MP Sanja Byelkin Jani Tolonen Since 2001 Since 1998 General Team (Optimizer, runtime, engines etc)Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  24. 24. The team behind MariaDB at MP Vladislav “Wlad” Vaintroub Alexey “Holyfoot” Botchkov Since 2008 Since 2008 Windows, Performance & GISNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  25. 25. The team behind MariaDB at MP Hakan Küçükyılmaz Philip Stoev Since 2004 Since 2007 QA and performance teamNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  26. 26. The team behind MariaDB at MP Colin Charles Kurt von Finck Since 2005 “The new guy” Photo by James Duncan Davidson Community teamNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  27. 27. The team behind MariaDB at MP Bryan Alsdorf Daniel Barholomew Since 2004 Another new guy Knowledgebase and WebNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  28. 28. The team behind MariaDB at MP Rasmus Johansson Camilla Zilliacus COO, Since 2010 Admin, since 2002And of course, someone has to take care of this merry group...Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  29. 29. There are a lot of others involved● Most features in MariaDB 5.2, released as stable in November 2010, were contributed by the community!● In the askmonty.org knowledge base (free MariaDB and MySQL documentation) we have now 1200+ articlesStatistics from the past month:● Added/Changed Articles: 58● On Freenode #maria, 227 people wrote 6085 lines● Launchpad Activity: ● 15 active branches ● 210 commits by 10 people ● Emails: 117 (discuss, dev)● Hundreds of thousands of downloads of MariaDB 5.2 (since release)Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  30. 30. Free MySQL / MariaDB documentationThe knowledgebase allows you to:● Find answers to your problems● Ask questions and get answers from others● Add your own documentation.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  31. 31. User & partners● We have seen companies converting hundreds of machines to MariaDB in a few days without any problems. ● We are working with them to produce success stories of these.● Monty Program Ab has 30+ partners involved in MySQL and MariaDB● Several companies are now sponsoring features for MariaDB! ● Monty Program Ab sponsors MariaDB development with 50 % of our developers time!● Some companies with MySQL expertise internally have signed direct support contracts with Monty Program Ab; All other support are done through partners.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  32. 32. SkySQL● Monty Program Ab has now signed a strategic partnership rd with SkySQL to be their 3 level support and main development department.This is important for me personally because:● Monty Program Ab can provide a home for MySQL developers, but not for support, training and consulting.● The MySQL ecosystem need support companies like SkySQL, were the first person you talk to knows more than you about MySQL / MariaDB.When MySQL AB joined with Sun we were 400-450 persons.I was just told from someone that there are only 54 left atOracle! Much fewer than I would expect.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  33. 33. When its time to change supportIts time to change support providers when you get answerslike (without a clear reason why this is likely to fix the problem):● Restart your database server● Restart your machine● Dump and restore your data● Install a new major version and see if it helps.● We dont support older MySQL versions (or MariaDB)Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  34. 34. Is MariaDB a branch or a fork? Branch or fork, that are the answers. What is the question?Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  35. 35. MariaDB is now a forsch (or brock?)We have forked the MySQL client library (C connector) because :● Oracle removed the original FOSS exception from the C connector files and replaced it with a link to a web page that can change any time and the text is extremely hard to parse.For the main server, we are still doing merges to ensureMariaDB continues to be a drop in replacement of MySQL.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  36. 36. Current state of C connector● We re-released the 3.23 LGPL client ● Works for many applications except: ● Not link-level compatible with the newest one (you have to recompile) ● Does not support the new authentication protocol● The MariaDB source code and releases contains a C connector with still has the original FOSS exception (we dont apply new code from Oracle to it)● We have created a new LGPL C Connector that will be released shortly (this was sponsored by several companies) ● Alpha in April ● Beta in MayNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  37. 37. Why a free C connector is important MySQL Server (GPL) MySQL Client- Server Protocol /C /J /C /C Connector (GPL) JDBC Perl ODBC DBI Standard Interfaces (not GPL) Not bound by GPLThe C connector is the only MySQL/MariaDB connector wherethe GPL affects your application. All others are free to use withany program! (No commercial licenses)Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  38. 38. MariaDB server is a branch of MySQL● User level (data, API, replication..) compatible with MySQL ● Drop in replacement (MariaDB 5.1 is even more compatible with MySQL 5.0 than MySQL 5.1). ● More plugins, more features, faster, better code quality.● GPL-only license. C Client library with FOSS exception.● More open development ● Source in public repository on launchpad ● Active external contributors ● All development plans public on askmonty.org● Current state ● MariaDB 5.2 was released as stable in November 2010 ● MariaDB 5.3 out in alpha. Beta during April. ● MariaDB 5.5 beta planned for May.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  39. 39. Major new features in MariaDB 5.2● SphinxSE: Text search within MariaDB ● Built-in Sphinx client which allows MariaDB to talk to searchd, run search queries, and obtain search results.● Virtual columns ● Columns that are an expression and are calculated on retrieval.● Extended User Statistics ● Client, User, Index and Table statistics.● Segmented MyISAM key cache (see separate slide)● Pluggable Authentication● Storage-engine-specific CREATE TABLE● Very fast copying to temp table phase.● Group commit & better recovery for the Aria engine. ● Speeds up multi-user inserts. Blue means developed by the communityNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  40. 40. MyISAM Segmented key cache● Blue line is without segmented key cache.● Solves one of the major read bottlenecks for MyISAM● We see up to 250% performance gain depending on the amount of concurrent users.● Fix applies to all MyISAM usage with many readers!Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  41. 41. MariaDB 5.3 & 5.5● 5.3 estimated to be in beta (all new features pushed) this month● 5.3 → 5.5 merge is in the works. Estimated to be finished in April/May.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  42. 42. Whats new in MariaDB 5.3This is the biggest redesign of the MariaDB optimizer in 10 yearsand it will finally make all subqueries usable in MariaDB.● Faster subqueries ● Back porting and extending subquery optimization from MySQL 6.0 ● No materialization for many kinds of subqueries or VIEWs in the FROM clause. SELECT * from (SELECT ....) ● Caching of subquery resultsIn applicable cases, you can get 10x – 100x speedups.● Faster joins (of big tables) thanks to ● Multi-Read-Range (MRR) access (better than in MySQL 5.6) ● Batch key access (BKA) ● Index condition pushdown ● Classic Hash joinsNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  43. 43. Whats new in MariaDB 5.3Some common sub queries that are now significantly faster:● No materialization or materialization with keys: ● SELECT anything FROM (SELECT ....) AS a WHERE a=...● Caching of common values (Good if outer_ref has a few values) ● SELECT (SELECT ... WHERE outer_ref=xxx) FROM ...● Transformations ● SELECT * FROM big_table WHERE big_table.col IN (SELECT anything FROM small_table) -> Reorders SELECT:s to use sub query as driving table● Materialization with keys in temporary table also for WHERE ● SELECT ... WHERE a [NOT] IN (SELECT not-a-key ...)Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  44. 44. New Batched Key Access Speedups● Join benchmark with BKA 3000 2500 query time, sec (smaller is better) 2000 BKA, join_buffer_size=32M 1500 10x Regular join 7x 1000 500 3x 0 query_size=1 query_size=2 query_size=3 select max(l_extendedprice) from orders, lineitem where o_orderdate between $DATE1 and $DATE2 and l_orderkey=o_orderkey Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  45. 45. Whats new in MariaDB 5.3● Full microsecond support. This includes TIMESTAMP, TIME DATETIME types, NOW() and all CAST and TIME related functions, replication etc.● Group commit between binary log and storage engines ● FASTER and safer replication● Lots of small optimizations, code cleanups, better error messages and bug fixes.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  46. 46. Group commit scales well! Commits per second vs. number of connections, RAID 1 HDD•Yellow line shows group commit performance•Now get scalability, only pay the cost of the 3 * fsync()Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  47. 47. MariaDB 5.3 and NoSQL The main reasons for using NoSQL are: ● Handling of unstructured data (not everything is table and fixed number of columns) ● Faster replication (usually with unconventional shortcuts)● The same way MySQL with its storage engine interface can handle both transactional and datawarehousing , we are extending MariaDB to be a bridge between SQL and NoSQL.● MariaDB 5.3 has now even better “NoSQL” support: ● Faster HANDLER commands; HANDLER READ now also work with prepared statements. ● HandlerSocket compiled in (Direct access to InnoDB) ● Dynamic columns (each row can have different set of columns)Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  48. 48. HANDLER READ improvements● Streamlined HANDLER READ interface● Added support for prepared statements● Added support for MEMORY tables.Effect is:● All HANDLER READ calls are now 7% faster● 20-50% speedup when using prepared statements and better concurrency.● You can now get up to 530,000 queries/second trough SQL with NO-SQL commands (60% of HandlerSocket).Stephane Varoquis blog:http://varokism.blogspot.com/2011/01/20-to-50-improvement-in-mariadb-53.htmlNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  49. 49. SQL doesnt solve all common problemsThe (web) store problem:All items needs: ID, Type, Price, Country, Manufacturer)A T-Shirt has the following additional properties: Size, color...A computer has the following additional properties: CPU, MHz, memory, Watt...There is no easy way to store many different types into arelational database!(It will not work by having one table/types as joins becomesimpossible to manage).Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  50. 50. Dynamic columns in MariaDB 5.3● With dynamic columns all extra columns are stored in one or many packed blobs, maintained by the database.● You can instantly add more columns, remove or query them for a row.● You can access columns in the server or retrieve the full blob to the client and manipulate it there.● You can use virtual columns to create indexes on some values. ● True indexes for dynamic columns is planned for later.● Implemented trough functions to enable use by ODBC etc.● First implementation uses an integer to access columns.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  51. 51. Dynamic columns in MariaDB 5.3● Simple set of functions (available in server and client): ● COLUMN_CREATE(column_nr, value,[column_nr,....]) ● COLUMN_ADD(blob,column_nr, value, [column_nr,...]) ● COLUMN_DELETE(blob, column_nr, column_nr...); ● COLUMN_EXISTS(blob, column_nr); ● COLUMN_LIST(blob, column_nr); ● COLUMN_GET(blob, column_nr, type);As a proof of concept we plan to create an experimentalstorage engine for HBASE where we use dynamic columnsas a bridge.More about Dynamic columns at todays talk at 3.05 PM.Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  52. 52. What are planned for MariaDB 5.6 ?At the Lisbon MariaDB meeting we created the following list ofproposed features. This list is still work in progress, contact us ifyou want to get something added / ensure something is done!● GIS ● OpenGIS compliance ● Deeper integration of GIS with optimizer● More online operations ● Analyze table ● ALTER ONLINE TABLE● Compatibility & usability ● IPv6 ● Query logging and summary per query ● Audit for specific usersNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  53. 53. What is planned for MariaDB 5.6 ?● Replication ● Extend group commit to have on sync per group commit ● Global transaction id ● Parallel applying of binary log in slave● Statistics and monitoring ● Phone home (code done for 5.3) ● Better EXPLAIN ● Persistent table statistics ● Log all SQL errors ● Progress indicator for LOAD DATA and SELECT ● Better monitoring for replicationNotice: MySQL is a registered trademark of Sun Microsystems, Inc.
  54. 54. What is planned for MariaDB 5.6 ?● Optimizer ● Implement UNION ALL without usage of a temporary table ● Grace HASH join (Need sponsor) ● Sort merge join (Need sponsor)● Performance ● Better multi CPU performance above 16 cores ● Better thread pool (we already have a prototype for this) ● More scalable query cache under higher concurrency ● Optionally with stale data ● Faster VIEW (dont open & parse view for every query)● Easy of use ● VARCHAR and BLOB support for memory tables ● Table functionsFor full list, see http://kb.askmonty.org/v/plans-for-56Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  55. 55. New thread pool for 5.6Thread pools solves a couple of problems:● Allows you to limit the number of worker threads at your machines peek performance.● More fair scheduler; Less query time distribution● If too many queries, machine can run at 1% of peek performance● New tread pool for 5.6: (Tested with 24 CPUs):● Always better on Windows● Better one Linux than thread-per-connection after 1024 connections● Much less performance degradation when more connections (60% performance instead of 1%)Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  56. 56. AnnouncementsWe are arranging a Plugin & Storage Engine Summiton Friday, to be held at Facebook.http://kb.askmonty.org/v/storage-engine-summit-2011● Contact Sergei, Colin or me if you are interested!We are launching an MariaDB ambassador programto spread knowledge about MariaDB / MySQL.http://montyprogram.com/ambassadors/We have a T-Shirt + dinner auction to support Japanat Monty Program Ab boot #411Notice: MySQL is a registered trademark of Sun Microsystems, Inc.
  57. 57. Come to the MariaDB boot & Bof ● You can find MariaDB developers at the MariaDB / Monty Program Ab booth #411. ● There is a Bof about the 5.6 features at 8.30 pm Please come by if you want to ● Know more about MariaDB ● Participate in its development ● Sponsor features ● Get support for MySQL or MariaDB! There is also a lot of sessions today and tomorrow about MariaDB!Notice: MySQL is a registered trademark of Sun Microsystems, Inc.

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